This hostile action was unprecedented.

The attack on Sony for creating a film featuring Kim Jong-Un was very damaging not only to the corporate image but also for individual employees. The fact that they chose to pull the film after this pressure will set a precedent that will encourage rogue states to attack companies that they consider dangerous to their aims.

It displays impunity and vulnerability.

North Korea's attack on Sony was not just appalling but shocking. They forced a company to drop a project worth millions of dollars and hundreds of hours input by use of hacking and terror threats. An investment made by a law abiding company should not be victimised as so. Since the perpetrators walked free and no guarantee that the ordeal would not be repeated, it is natural that other companies should be worried too.

Yes, North Korea's attack on Sony should leave all companies worried.

North Korea's recent cyber-attack on Sony should put large companies on edge. This recent attack demonstrated that they have the hacker skills to break through firewalls and access private computer files with ease. The ability that North Korea has to disseminate confidential information is highly concerning and other companies in the U.S. should be worried.

Yes, corporations of all stripes should be very worried.

Generally speaking, public outrage over Sony's withdrawal of "The Interview" from theaters has dominated media reports on the developing drama, and consequently a greater, more important point has gotten lost in the shuffle. These events represent probably the first really significant act of cyber terrorism carried out against a high-profile organization, and rather than yelling about free speech, other companies need to pay attention to what has happened and take measures to secure their own networks and data, because this kind of thing can, and will, happen again.